VPC Deep Dive
Security Groups
ALB
Auto Scaling
Architecture and Tradeoffs
Practice
Assignment
Cloud Track
Under construction
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Implementation plan:
- Security groups: stateful firewall rules at the instance level
- Inbound vs outbound rules
- Allow-only model: no explicit deny in security groups
- Common patterns: allow SSH from your IP, allow HTTP/HTTPS from anywhere, allow app port from ALB only
- Referencing other security groups (e.g. ALB SG → app SG)
- Network ACLs (brief): stateless, subnet-level, allow + deny — when they matter
- Security groups vs NACLs: practical differences
- Practice: create security groups for a web tier and an app tier, test connectivity
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